| Based on the 1984-2019 NBA and CBA tournament general tactics statistics index as the research object,through the literature material method,expert interview method,video observation method,questionnaire survey method,mathematical statistics,logic analysis method for the NBA and CBA recorded video analysis and data analysis,in combination with predecessors’ research results,the characteristics of modern basketball competition and basketball movement development direction is selected on the basis of the research direction and the conclusion is put forward.1.From 1949 to 1984,when the NBA had only five statistics,the prototype of modern technical and tactical metrics.Since the establishment of "three-point line" and "three-point shooting" rules in NBA and FIBA rules in 1985,the technical and tactical statistical index system has been relatively perfect and complete technical and tactical statistical indexes can be obtained,and 18 preliminary indexes have been published as the quantitative evaluation system.2.High-order data came into being after the 1990 s.High-order data are technical and tactical statistical indicators based on the preliminary data,which are obtained by calculating 18 preliminary data with corresponding calculation formulas.Most of them are proposed by NBA coaches and researchers.This kind of index can be used in NBA,CBA and other basketball games.4.The CBA statistical index is composed of three indexes: dunking,fast break and being fouled on the basis of the existing 18 preliminary data of NBA.CBA statistics of the shot including two shot shot,three shot shot;The NBA counts total field goal attempts(the sum of two-point shots and three-point shots)and three-point shots.Because shooting points in basketball includes two-point shots and three-point shots.Therefore,the statistical system should contain 21 items of preliminary data and several high-level data,that is,on the premise of 18 items of preliminary data statistical indicators in NBA,three preliminary indicators in CBA statistics should be added.Seventy-two items of high order data were calculated by the initial order data.5.In 2016,NBA revised the time limit of second offense to 14 seconds,and made more comprehensive statistics on the basis of 18 preliminary indexes and 72 items of advanced data.Synergy system is a high-tech basketball game technical and tactical analysis system introduced by various basketball leagues in the United States around 2014.It mainly draws conclusions through the post-analysis of the video uploaded by the team.At present,this technical field is the cusp and main developing direction of the research on basketball techniques and tactics in the future.However,due to the fact that the technology is too specific to the data analysis of a single team and player,its applicability and promotion is not very high,so the technology is only fully utilized in the NBA.CBA does not use this technology for various reasons,so it is only possible to manually count some of the indicators in the Synergy system.6.Nowadays,there are 18 general order data and 72 items of high order data(static data)in the quantitative indicators of techniques and tactics in NBA and CBA,but NBA attaches more importance to data analysis than CBA.Therefore,NBA has established a professional data analysis department since 2010,while CBA began to pay attention to the department of team data analysis after 2016,and the statistical indicators and data analysis methods used by it are still quite different. |
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